He was able to tell because he's probably grown a few Cattleyas and has seen that immature growths keep putting out immature leaves until the mature one(s) emerge(s). The immature leaves then dry up and become the protective sheath around the developing pseudobulbs.
There's also the fact that he most likely saw the beige portion of the shoot are dried up tissue from the immature leaves.
If it was rot, the developing shoot would most likely not make it as far as yours did. Even if a large almost mature shoot did develop rot on the leaves, the developing pseudobulb will still be around as long as you remove the rotten leaf early enough.
Last edited by King_of_orchid_growing:); 09-29-2009 at 10:25 PM..
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